509379847 has 2 divisors, whose sum is σ = 509379848. Its totient is φ = 509379846.

The previous prime is 509379839. The next prime is 509379877. The reversal of 509379847 is 748973905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 509379847 - 2³ = 509379839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 509379794 and 509379803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509379877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254689923 + 254689924.

It is an arithmetic number, because the mean of its divisors is an integer number (254689924).

Almost surely, 2^509379847 is an apocalyptic number.

509379847 is a deficient number, since it is larger than the sum of its proper divisors (1).

509379847 is an equidigital number, since it uses as much as digits as its factorization.

509379847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The square root of 509379847 is about 22569.4449865299. Note that the first 3 decimals coincide. The cubic root of 509379847 is about 798.6330024568.

The spelling of 509379847 in words is "five hundred nine million, three hundred seventy-nine thousand, eight hundred forty-seven".